Efficient band-pass color filters enabled by resonant modes and plasmons near the Rayleigh anomaly
作者： Daniel B Mazulquim , Kyu Jin Lee , Jae Woong Yoon , Leone V Muniz , Ben-Hur V Borges
DOI: 10.1364/OE.22.030843
关键词: Resonance 、 Guided-mode resonance 、 Waveguide (electromagnetism) 、 Optics 、 Color filter array 、 Materials science 、 Diffraction grating 、 Plasmon 、 Optoelectronics 、 Grating 、 Rayleigh scattering
摘要: We design and fabricate efficient, narrow-band, transmission color filters whose operating principle resides in a narrow-band guided-mode resonance associated with surface-plasmon resonance. The fundamental device consists of an aluminum grating over 200-nm-thick oxide film on glass substrate. Numerical simulations show sharp resonance-derived spectral profile that is additionally shaped by neighboring Rayleigh anomaly. Besides the effect, we numerically narrow bandwidth predominantly due to low refractive-index contrast between waveguide Red, green, blue are fabricated using ultraviolet holographic lithography followed lift-off process. experimental efficiency exceeds 80% full-width-at-half-maximum linewidths near 20 nm. provide images zero-order transmitted spectra, illustrate pure colors modal extracted as side-coupled output light.
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